4.0 A book outside the chronology of the previous two volumes, but ultimately a little too overtly fantastic for my tastes. The myths and techniques hinted at are interesting as is the historical setting and time travel of the roamers, but I greatly prefer the more subtle supernatural wonders of Greenglass House and Ghosts of Greenglass House. Another problem is that the characters, while interesting enough and tied to the main narrative of the series - aren't as fully developed as in the other titles. I did still enjoy it quite a bit and would certainly recommend it for readers who have like the series so far.